Infusion and vascular access nursing covers two related jobs: getting reliable access into a patient's circulation and keeping it working, and delivering therapy through it.
The specialty exists because vascular access is deceptively consequential. A poorly chosen or poorly maintained line causes bloodstream infection, thrombosis, extravasation injury, and — in patients who will need access for years — the exhaustion of usable veins.
Vascular access teams
Many hospitals run a dedicated team, and its work is device selection as much as insertion.
Peripheral catheters, including ultrasound-guided placement for patients with difficult access, which is the skill that turns a repeated failure into one attempt.
Midline catheters, longer peripheral devices for therapy of intermediate duration.
Peripherally inserted central catheters, placed at the bedside by specially trained nurses under ultrasound with tip-location technology. This is one of the clearest cases of a procedure moving from physicians to nurses, and it moved because nurse-led teams demonstrated better first-attempt success and lower infection rates.
Care and maintenance of central lines and implanted ports — dressing changes, needleless connector practice, flushing, and troubleshooting occlusion.
The team's most valuable output is often a recommendation rather than a device: matching the catheter to the therapy, its expected duration, and the patient's vein anatomy, and declining to place a central line that is not needed. Every day a central line stays in adds infection risk, and daily review of necessity is a core prevention measure. See infection prevention nursing.
Infusion therapy
The therapy side spans settings that look nothing alike:
- Hospital infusion of antibiotics, chemotherapy, blood products, and parenteral nutrition.
- Ambulatory infusion centres treating immune, neurological, and inflammatory conditions with biologics and immunoglobulin — a fast-growing part of the field. See ambulatory care nursing.
- Home infusion, where the nurse teaches a patient or family to run therapy themselves and visits to reassess. See home health nursing.
- Oncology infusion, which is its own specialty. See oncology nursing.
The clinical risks are consistent across all of them: infiltration and extravasation, phlebitis, catheter occlusion and breakage, air embolism, infusion reactions and anaphylaxis, and medication error at the point of administration.
Standards and certification
The Infusion Nurses Society publishes the Infusion Therapy Standards of Practice. They address work such as selecting an access device, maintaining a dressing, assessing a site and responding to complications. Employers use them when developing local policies and competency checks.
CRNI certification
The Infusion Nurses Certification Corporation (INCC) awards the Certified Registered Nurse Infusion (CRNI) credential. It sets different requirements for the first exam and for renewal.
| Stage | Experience and license | Exam or renewal requirement |
|---|---|---|
| Initial certification | An active, unrestricted RN license and at least 1,600 hours of infusion therapy experience as an RN in the previous two years. The handbook lists US and Canadian licensure and a separate application route for nurses practicing internationally. | Pass the initial CRNI examination. International applicants should check the handbook for license and credential-evaluation documents. |
| Renewal every three years | An active, unrestricted RN license and at least 1,000 hours of infusion therapy experience in the preceding three years. | Pass the examination in the final year of the cycle, or earn the required CRNI recertification units and submit a renewal application. |
Qualifying infusion experience can come from clinical practice, nursing education, administration or research in the specialty. An educator who teaches infusion therapy, for example, should document the infusion portion of the job rather than counting every working hour. Direct bedside hours are not the only route.
For the continuing-education renewal route, the January 2026 INCC examination handbook specifies 40 CRNI recertification units, including at least 30 from national INS meetings or INS virtual education conferences. Recertification units are distinct from raw CE contact hours. Check the handbook for the cycle in which you will renew.
Two related credentials answer different questions. The Vascular Access Certification Corporation's VA-BC focuses on vascular access and accepts eligible clinicians from several disciplines. The ONS/ONCC Chemotherapy Immunotherapy Certificate of Added Qualification recognizes completion and assessment of an oncology course. An infusion RN pursuing oncology work should check the employer's competency requirements separately. The oncology credentials guide explains the distinction between a course certificate and professional oncology certification.
The economics
Vascular access teams are one of the few specialist nursing services with a clean business case. Central line-associated bloodstream infection is publicly reported and carries payment penalties, so a team that lowers the rate, reduces failed insertion attempts, and shortens delays to therapy pays for itself in a way the finance department can follow.
That is also its vulnerability. Teams established during a push on infection rates are among the first services cut when the rate has been low for a while — after which it stops being low.
Related
- Infection prevention nursing
- Oncology nursing
- Home health nursing
- Nephrology and dialysis nursing
- Nursing specialties
Sources
- Infusion Nurses Society: CRNI certification questions (accessed November 11, 2026).
- CRNI Recertification — Infusion Nurses Society, on the three-year cycle, 1,000-hour requirement, and recertification units. Accessed September 9, 2026.
- National Healthcare Safety Network — Centers for Disease Control and Prevention, on reporting of central line-associated bloodstream infection. Accessed September 9, 2026.
- INCC: January 2026 CRNI examination handbook, including initial and renewal requirements (accessed November 11, 2026).
- Vascular Access Certification Corporation: eligibility (accessed November 11, 2026).
- Oncology Nursing Society: ONS/ONCC Chemotherapy Immunotherapy Certificate of Added Qualification (accessed November 11, 2026).